APA-referens

(1991). International science and technology data update 1991. Washington: National Science Foundation.

Chicago-stil citat

International Science and Technology Data Update 1991. Washington: National Science Foundation, 1991.

MLA-referens

International Science and Technology Data Update 1991. Washington: National Science Foundation, 1991.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.